Method of making stencil-machine character-punches.



S. D. HARTOG. vMETHOD oF MAKING STBNCIL MAGHINECHARACTBR PUNGHES.

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UNTTED sTATEs PATENT oEEIoE.

STEPHEN D. HARTOG, OF ST. LOUIS., MISSOURI, ASSIGNOR TO THE DIAGRAPHCOMPANY,

OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

METHOD OF MAKING STENCIIi-MACHINE CHARCTER-PUNCHES.

Specification of Letters I atent i Patented June 6i, 1911,

Application led April 2G, 1910. Serial No. 557,635.

`from which portions forming the character punch have been removed inaccordance with the first step of my improved method.` Fig. 2 is ahorizontal section taken approximately on the line 2 2 of Fig. 1. Fig. 3is a plan view of one of the plates with the punched out portionsrestored to the plate as contemplated by the second step of my improvedmethod. Fig. 4 is a cross section taken on the line 4 4 of Figr. Fig. 5is a plan or face view of the plate forming the base of the completedpunch, and which plate is perforated with the same set of punches usedin punching out portions of the die plate. Fig. 6 is a cross sectiontaken on the line 6-'6 of Fig.l 5. Fig. 7 is a face view of the punchplate in position on top of the die plate with the punched out portionsof said die plate inserted in the punch plate as contemplated bythefinal step of my improved method. Fig. 8 is a cross section taken onthe line 8-8 of Fig. 7. Fig. l9 isk an elevation of a completed punchconstructed by my improved method.

My invention relates to a novel and convenient method of making cilmachines, and the object of my invention is to simplify and cheapen themanufacture of character punches.

In the first step of turcs 2 which are adapted to receive pins locatedin a suitable base for the purpose of character punches, such as areordinarily used 1n stenj my improved method' a comparatively thick metalplate 1 isprovided at predetermined points with aper,

improved method is carried out by the means of a master die 5 throughwhich operates a series of plungers 6 corresponding to the character tobe formed and arranged to move vertically above the die 5 is a masterpunch 7 carrying a series of projections 8 corresponding to thecharacter to be formed.

By means of the mechanism just described ythe portions 3 are punched outof the die plate after which said portions are again seated in theapertures 4 and at this point in the operation incident to carrying outmy improved method the die plate is in the condition illustrated in Fig.4. A comparatively thin metal plate 9 provided with apertures 10, whichcoincide with the apertures 2 formed in the die plate is now positionedon the master die 5, and' a series of apertures 11 are punched in saidplate 9 by means of the master punch 7, thus said plate 9 is providedwith a character formed by rows of aperturesll, which aperturescorrespond with'the portions 3, which have been punched from andreinserted in the die plate 1. The die plate 1 with the insertedportions 3 is now positioned on top yof a series of pins 12 rigidlyfixed in and projecting upwardly from a base 13, and which pins coincidewith `the inserted portions 3 carriedby the die plate 1. The die plateVis held lin proper position on the base13 by means of pins 14 seated insaid base, and which pins pass through the apertures 2. The plate9provided with the apertures 11- is now positioned on top of the baseplate 1 with the pins 14 passing through the apertures 10 in said plate9, and when so positioned the punched out portions 3 coincide `with ltheopenings 11 in said plate 9.

kA block 15 provided in its under side with recesses 16 coinciding withthe apertures 11 ,in the plate/'9 is now firmly positioned'on top ofsaid plate 9. The block 15-is now forced downward with pressure, or thebase ,13 may be forced upward with pressure and by such operation theportions 3 are forced out of the plate 1 into the apertures 11 in theplate 9. When so positioned the plugs or punched out portions 3 arefirmly seated in the plate 9 with their upper portions projecting beyondthe top surface of ysaid plate 9,and the edges of these exposed orprojecting upper portions are provided with and maintain the Vminuteburs formed on said edges at the time said plugs or portions 3 Werepunched from the plate l. When the finished plate is hardened theseminute burs form sharp cutting edges which is a very desirable featurein stencil machine character punches.

Vhile I have shown a comparatively simple form of apparatus forpracticing my improved method it will be readily understood that themethod can he practiced in a number of different Ways. The essentialfeature of my improved method is the seating of the punched out portionsor plugs in the base plate with the exposed or projecting edges of saidplugs or punched out portions bearing the minute marginal hurs.

Considerable time and labor and consequent expense is saved in themanufacture of punches by my improved method and the punches formed bysuch method are comparatively light in Weight, have the requisitestrength and rigidity, and the exposed edges of the projecting portionsof the punch maintain the minute burs formed at the time the punched outportions are removed from the comparatively thick plate.

I claim:

l. The hereindescrihed method of making stencil machine characterpunches, consisting in forming a series of apertures in a plate,punching a series of plugs from a thicker plate, which plugs correspondwith the apertures formed in the first mentioned plate, and finallyforcing the plugs from the second mentioned plate into the apertures inthe first mentioned plate.

2. The hereindescribed method of making stencil machine characterpunches, consist ing in punching a series of plugs from a plate,restoring said plugs to the apertures from Which said plugs Werepunched, forming a series of apertures in a thinner plate, and Whichapertures correspond with the plugs punched from the first mentionedplate and finally removing the plugs from the first mentioned plate andinserting them in the apertures formed in the second mentioned plate.

3. The hereindescribed method of making stencil machine characterpunches, which consists in first punching a series of uniform sizedportions from a plate, then restoring said portions to the aperturesfrom which they Were punched, then forming a series of apertures in acomparatively thin plate, then placing said comparatively thin plate ontop of the first mentioned plate and forcing the portions punched fromthe first mentioned plate into the apertures formed in the secondmentioned plate.

4. The hereindescribed method of making stencil machine characterpunches, consisting in first forming a series of plugs, then forming aseries of apertures in a plate Which is thinner than the plugs, and theninserting the plugs in the apertures of the thinner plate.

5. The hereindescribed method of making stencil machine characterpunches, Which consists in forming a series of apertures in acomparatively thin plate and then forcing a series of plugs into saidapertures which plugs are thicker than said plate and project from oneof the faces thereof.

6, The hereindescribed method of making stencil machine characterpunches consisting in punching a series of portions from a plate in sucha manner as to produce a minute bur on one edge of each punched outport-ion, and then inserting the punched out portions in a plate in sucha manner that parts of the punched out portions project from the face ofthe plate and which projecting parts carry the minute burs on theirexposed edges.

7. The hereindescribed method of making stencil machine characterpunches consisting in punching a series of plugs or portions from aplate, restoring said plugs to the apertures from which said plugs Werepunched, forming a series of apertures in a thinner plate, Whichapertures correspond With the plugs punched from the first inentionedplate, then laying the thinner plate on top of the first mentioned plateand finally forcing the plugs from the first ment-ioned plate into andpartially through the apertures in the thinner plate.

In testimony whereof I hereunto affix my signature in the presence oftwo Witnesses, this 16th day of April, 1910.

STEPHEN D. HARTOG.

Vitnesses:

M. P. SMITH, ALMA GEBHART.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

